my honda ride on lawn mower was starting up every time . suddenly it will not start ,plenty of life in batttery . but no spark . i have installed new spark plugs . but still will not fire.
If you can identify the coil pack, next to the flywheel, see if you can find the small wire that connects to earth when you turn the machine off - maybe its the ignition switch at fault.
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Try fixfault.com to fix lawn mowers.